Engine-valve governor



.(Nc Model.)

S. E. JARVIS.

ENGINE VALVE GOVERNOR.

No. 273,999. Patented Mar; 13,1383.

PATENT raise.

S MUEL E. JARvIs, on LANSING, MICHIGAN.

ENGINE-VALVE covERNoR.

SPECIFICATION forming part of Zetters Patent No. 273 ,999, dated March13, 1883.

Application filed November 8, 1882. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL E. J ARVIS, of Lansing, in the county of'Ingham and State of Michigan, have invented new and useful 5Improvements in Engine-Valve Governors; and I hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeinghad to the accompanying drawings, which form a part of thisspecification.

The nature of this invention relates to certain new and usefulimprovements in the construction of engine-valve governors.

The object of my invention is, first, to shift the valve-eccentricin itsplane upon the shaft in a straight line across its face; second, toreduce thefriction of the parts of the governor to its minimum, soas tomake the governor very sensitive; third, to provide easy means ofadjustment.

The invention consists in the peculiar construction, arrangement, andvarious combina tions of the parts to effect thedesired result, all asmore fully hereinafter described.

Figure 1 is a rear elevation of my improved governor. Fig. 2 is avertical central section on line X K. Fig. 3 is a cross-section on lineY Y. Fig. 4 is a detached perspective of the flying weight and itspivot. Fig. 5 is a detached perspective of the anti-frictionconnecting-rod. 7

In the accompanying-"drawings, A represents the valve-eccentric, B theeccentric-strap, and -O the revolving shaft of the engine.

D isa straight slot in the body of the ecby means of which the eccentricismade shiftable, so as to vary its throw by the means and in the mannerhereinafter described.

E is a disk keyed or otherwise secured upon the shaft.

a is the rim of the disk, which is made of proper size to inclose andprotect the parts of the governor, as usual.

Cast or otherwise secured upon the eccentric are the twolugs b c,diametrically opposite each other. Pivotally. secured to these lugs bybolts 61 e are the two links F and G, whose opposite ends are alsopivotally secured by means of other bolts, f g, to the disk E, the two5o bolts f gforming, through themedium of the link F G and bolts (2 e,the means of holding centric, through which the shaft passes, and

J is a knife-edge support, of hardened steel,.

formed on the bolt K, which latter is securely "attached by a nut, i, tothe disk E. The free end of the bell-crank lever I is provided upon itsinner end with aconcave bearing, k, of proper size to admit the roundingend l of the yoke-rod L. The opposite end, m, of this yoked rod isstepped in a concave bearing, a, on the link Gr, so as to bring thepressure of that red directly uponthe pivotal bolt 0 of said link.Opposite the concave bearing it upon the link G is another concavebearing, 0, in which the rounding end of the set-screw M rests. Thisset-screw passes through a nut, 11, which is attached to the end 'of thecoilspring N, the opposite end of which is secured to the rim of thedisk E, a hollow stud, q, pro jecting far enough up into the coil-springto prevent its buckling. r is a small hole in the rim, to give access tothe set-screw M for purposes of adjustment.

In practice, with the engine at work an increase in speed will throw theweight H away from the center of motion and turn the bellcrank lupon theknife-edge pivotJ and communicate its motion through the medium of theyoke-rod Lto the link G, by which motion the eccentric is shifted uponthe shaft, causing also a compression of the epring N, which compressionwillin turn effect a shifting of the eccentric in a reverse manner assoon as the speed of the engine decreases.

By altering the compression of the spring N by means of the set-screw Many desired adjustment as to the amount of the throw of the, eccentriccan be obtained without altering the position or amount of the weightHwithin a certain limit.

It will be seen that the yoked rod L cannot leave its concave bearings,owing to the action of the spring N, which keeps the parts in engagement, the weight being prevented in its fall by a proper stop, .9.The action of the spring N will likewise make the knife-edge bearing Jact as a pivotal support for the bellcrank lever I.

What I claim as my invention is- 1. In combination with the disk E,having perforated rim a, the eccentric A, having slot D, the weightedlever I, and the spring N, combined with the sleeve q, having itsbearing on the inner surface of the rim a, the screw M, nutp, andconnecting devices, as set forth.

2. The lever Gr, pivoted to the disk E, and having recessed bearings nand 0, combined with the bar L, screw M, spring N, slotted eccentric A,weight-lever I, and connections, as set forth.

3. The eccentric A, having slot 1), the arms F and G, pivoted above andbelow to disk E and said eccentric, combined with the shaft 0,weight-lever I, spring N, and connections, as set forth.

4. The bar L, having a recess in which the lever 13 freely operates, andextremities Z and m, combined with the levers F and G, having recessedbearings, as shown, the spring N, lever I, disk E, and said eccentric,as set forth.

5. In a valve-gear having a shifting eccentric, the combination of thedisk E, having perforated rim a, the spring N, bearing at one end on thesleeve q and at the other end upon the nut 19, the screw M, levers G andF, as shown, bar L, lever I, weight H, and slotted eccentric A, wherebythe spring bears against the inner surface of the rim a, and the throwof the valve-rod adjusted through said rim a and spring N, as set forth.

SAMUEL E. JARVIS. Witnesses:

Hrs. SPRAGUE, A. BARTHEL.

